Improvement in whenchss



ufff/s M 3 ma l *ammlr tats/5 gattini@ JOI-IN ARVIN, OF VALPARAISO, INDIANA.

Letters Patent No. 86,967, dated February 16, 186'9.

IMPROVEMENT IN VVIREN'GHESL The Schedule referred to in these Letters Patent and making prt ofwthe same.

Bc it known that l, J ouN N. ARVIN, of the city of Valparaiso, in the county of Porter, in the State of liuiinnn, have invented n. new und useful Improvement on :he Wrench patented by one Thomas Pratt, on the :4th luy oi'Jztnnury, A. D. 1867, und numbered sixtyone thousand und ninety-seven, (61,097 and I do hei-elly dechire that the following is u. full, clear, and

emot description of the construction :ind operation o the sinne, reference being,r had tothe annexed drawings,

milking :i piut of this specification, in which- Figure l is u, View of the complete wrench, and

Figure 2 is n view of the separate pieces of said wrench und the screw D D, showing the oiee of said screw. y

lhc hairs A and G :ire of steel or wrought-iron, and Yorin the jews of said Wrench.

l The slide B B pierces the jaw A, and ismade fast to thejaw O.

It is made so :is tc be adj ustalblc at the slightest ieuci 1, and when the jaws A and C are properly adj usted, the screw D D is pressed against the slide B B by menus of the orifice D, through the end of the janv A., which 

